2556163793 has 2 divisors, whose sum is σ = 2556163794. Its totient is φ = 2556163792.

The previous prime is 2556163783. The next prime is 2556163829. The reversal of 2556163793 is 3973616552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2190895249 + 365268544 = 46807^2 + 19112^2 .

It is a cyclic number.

It is not a de Polignac number, because 2556163793 - 2¹⁰ = 2556162769 is a prime.

It is not a weakly prime, because it can be changed into another prime (2556163763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278081896 + 1278081897.

It is an arithmetic number, because the mean of its divisors is an integer number (1278081897).

Almost surely, 2^2556163793 is an apocalyptic number.

It is an amenable number.

2556163793 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556163793 is an equidigital number, since it uses as much as digits as its factorization.

2556163793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1020600, while the sum is 47.

The square root of 2556163793 is about 50558.5185008422. The cubic root of 2556163793 is about 1367.2971009770.

The spelling of 2556163793 in words is "two billion, five hundred fifty-six million, one hundred sixty-three thousand, seven hundred ninety-three".